Well, there is no plan to upgrade to 1.1.0 until Apache is modified to use it. 1.1.0 has a drastic API change so it's not like prior versions that one can simply just start building with instead (like 1.0.0, 1.0.1 & 1.0.2).

So once Apache has been modified to deal with it (in the works), we'll be upgrading to it.